From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754331Ab3BRPc5 (ORCPT ); Mon, 18 Feb 2013 10:32:57 -0500 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:21918 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753849Ab3BRPcz (ORCPT ); Mon, 18 Feb 2013 10:32:55 -0500 X-Authority-Analysis: v=2.0 cv=It2cgcDg c=1 sm=0 a=rXTBtCOcEpjy1lPqhTCpEQ==:17 a=mNMOxpOpBa8A:10 a=qKmpwTPKs3QA:10 a=5SG0PmZfjMsA:10 a=Q9fys5e9bTEA:10 a=meVymXHHAAAA:8 a=nQirTONGrIgA:10 a=JHOO3Pfs48h6cxfrU7AA:9 a=PUjeQqilurYA:10 a=rXTBtCOcEpjy1lPqhTCpEQ==:117 X-Cloudmark-Score: 0 X-Authenticated-User: X-Originating-IP: 74.67.115.198 Message-ID: <1361201574.23152.156.camel@gandalf.local.home> Subject: Re: RCU?: Scheduling while atomic with 3.4.23-rt33 From: Steven Rostedt To: Thomas Gleixner Cc: Tim Sander , linux-rt-users , LKML , "Paul E. McKenney" Date: Mon, 18 Feb 2013 10:32:54 -0500 In-Reply-To: References: <4738617.pBMCEJ5E3K@dabox> Content-Type: text/plain; charset="ISO-8859-15" X-Mailer: Evolution 3.4.4-1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2013-02-18 at 12:16 +0100, Thomas Gleixner wrote: > On Mon, 18 Feb 2013, Tim Sander wrote: > > Here is a transtribed backtrace for easier reading: > > c0010fac t dump_backtrace > > c022c188 T dump_stack > > c022c71c t __schedule_bug > > c022fb28 t __schedule > > c0230644 t rt_spin_lock_slowlock > > c0230ba8 T rt_spin_lock > > c003a9b8 T __wake_up > > c0052a44 t invoke_rcu_callbacks > > c0053764 T rcu_check_callbacks > > c0026060 T update_process_times > > That's due to CONFIG_TINY_PREEMPT_RCU=y. That's a known issue, which > has been fixed in 3.6-rt. > > Steven, could you backport that to 3.2/3.4 please ? > I'm currently trying to get -rt up with the latest stable releases (Greg is too damn fast). I'll add this in an -rc later today if I get a chance. Otherwise it may have to wait till next week, or perhaps I can work on it while at ELC (I leave tomorrow). Keynotes are always a good time to get tedious tasks done online. -- Steve